EP 0506686 B1 19940309 - EXHAUST PIPE WITH HELICAL-FLOW CATALYST SUPPORT.
Title (en)
EXHAUST PIPE WITH HELICAL-FLOW CATALYST SUPPORT.
Title (de)
ABGASLEITUNG MIT WENDELFÖRMIG ANGESTRÖMTEM KATALYSATOR-TRÄGERKÖRPER.
Title (fr)
CONDUITE DE GAZ D'ECHAPPEMENT AVEC UN SUPPORT DE CATALYSEUR RECEVANT UN ECOULEMENT HELICOIDAL.
Publication
Application
Priority
EP 89123787 A 19891222
Abstract (en)
[origin: WO9110048A1] In the invention a catalyst support (6) and/or a diesel soot filter (7) is fitted in a second section (2) of an exhaust pipe joined to a first section (1) with an approximately right-angled bend. The special shape of the intermediate member (4) connecting the two sections forces the exhaust gas to adopt a helical flow, causing an oblique flow around the support. This evens out the contact with the support over its cross-section and delays the onset of laminar flow in its channels so that the gas can react more effectively with the catalyst. In addition, supported where appropriate by a special surface structure (41, 42) in the intermediate member (4), a noise damping effect is achieved which facilitates savings on the silencer itself. The total pressure loss occurring in the line is thus reduced to the minimum.
IPC 1-7
IPC 8 full level
F01N 3/02 (2006.01); F01N 3/021 (2006.01); F01N 3/10 (2006.01); F01N 3/24 (2006.01); F01N 3/28 (2006.01); F01N 7/02 (2006.01); F01N 7/04 (2006.01); F01N 13/02 (2010.01); F01N 13/04 (2010.01); F02B 1/04 (2006.01); F02B 3/06 (2006.01)
CPC (source: EP KR US)
F01N 3/021 (2013.01 - EP US); F01N 3/28 (2013.01 - EP KR US); F01N 3/281 (2013.01 - EP US); F01N 3/2882 (2013.01 - EP US); F01N 3/2885 (2013.01 - EP US); F01N 3/2892 (2013.01 - EP US); F01N 13/009 (2014.06 - EP US); F01N 13/011 (2014.06 - EP US); F01N 2250/02 (2013.01 - EP US); F01N 2330/02 (2013.01 - EP US); F01N 2330/06 (2013.01 - EP US); F01N 2510/04 (2013.01 - EP US); F02B 1/04 (2013.01 - EP US); F02B 3/06 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP US); Y10S 55/30 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
WO 9110048 A1 19910711; BR 9007939 A 19921006; DE 59004955 D1 19940414; EP 0506686 A1 19921007; EP 0506686 B1 19940309; ES 2050049 T3 19940501; JP 2645410 B2 19970825; JP H04506394 A 19921105; KR 0159111 B1 19981215; KR 920703976 A 19921218; RU 2066376 C1 19960910; US 5144797 A 19920908
DOCDB simple family (application)
EP 9002142 W 19901210; BR 9007939 A 19901210; DE 59004955 T 19901210; EP 91900017 A 19910725; ES 91900017 T 19901210; JP 50065891 A 19901210; KR 920701363 A 19920609; SU 5052368 A 19901210; US 63330090 A 19901224